Chapter 11: "Limits Issues,"The Handbook on Additional Insureds edited by Timothy A. Diemand, Joseph G. Grasso, Michael Menapace and Charles Platto, American Bar Association Publications, January 2012.

At its most fundamental nature, the purpose of additional insured coverage is to protect the additional insured from claims of vicarious liability, that is, liability based entirely on the relationship between two insureds, as opposed to any active negligence on the part of the additional insured. The contours, exceptions, nuances and alternative approaches taken across the country and, internationally, have created the need for an all-inclusive lawyer resource. The Handbook on Additional Insureds serves as that resource by addressing all aspects practitioners are faced with when dealing with this complex coverage.